Leelbox M9S - does anyone have any experience?

I’ve just ordered one of these (well two actually) to test and I wondered if anyone had any thoughts on these boxes. So far, I can play most things, the quality of the boxes isn’t great. I’m struggling to play video which I can play on my higher end Android box.

The boot logo and KitKat isn’t great either and I’m trying to look into changing these.

Any thoughts and help would be awesome.